Oscillator tube mounting



Feb. 22, 1949. F H BRAKE OSCILLATOR TUBE MOUNTING Filed OCT.. 17, 1946 iatentecl Fei). 221, 194g UNITE-)D STATES 22,462,370.:

osolLLA'roR'TUBEMQUN'LNG" Frederick H. Drake,-.Boonton; Nr J2, assignorr tof Aircraft Radio1 Corporation; Boomen; Ni:- J af corporation if-New Jersey Application October 17, 1941i, SerialNo': (Cl.1'&.=44

liClaims;

1 This invention relates to oscillatortube mount'- ings, and. more particularly to metal housings Within'which microwave oscillator tubesY aresuprported in proper relatien te microwave guideV Tube sections and are 4completely shielded mountingsembodying-'the invention maybe usedl with any microwave oscillator'tube, such as a'- magnetron or Klystron, which operates atl'f'requencies requiring the use ofy wave guides toconduct output away fromfthe tube.

The invention will be described with respect Vto a housing-and mountingior aKlystron oscil llator twbe known as JANd type No, 2K50L` This' 'microwave generatoror oscillator tube is similar in general outer appearance'to the "metal tubes 1in common use in radio receivers, but differsL .from such tubes in that a glass disk or window" iissealed in and atthe center of the outer, rad-i- -ally-ilanged end of the microwavefoscillator tube. The output element of the microwave oscillator tube is a Wave guide of rectangular cross-sec tion at the inner face ofthe glass window; and the hanged end ofthe tube has a notch in its outer edge Afor cooperation with a pin o-r key on the 'housing to alinev the rectangular wave' guide of thetubewith a rectangular wave guidev section which is connected to the housing.

The several prior constructions Vforlmountinlg such oscillator tubes have-not been entirel-ysatisfactory as they were relatively complex andbulky, and they didy not permit a rapid removal' and repla-cementof the tubes. The mechanical problems involved are the alinement ofthe Wave guide of the tube and of Athefoutput line Afrom the microwave generator, and the axial'adj-ustmentofthe tube to compensate for manufac` turing variationsin the length of tubes.

Objects of this invention are to provide shield-Y ed mountings for microwave oscillator tubes which are of relatively simple mechanical con` struction to facilitate removal and replacement of the tubes. Objects are to provide mountings which ali-ord an automatic angular' and axial adjustment of the oscillator tubes into proper position with respect to the associated wave guide section, and which impose no stress upon the tube per se, upon the'tube socket or uponlthe leads to the tube socket. A further object -is to provide a mounting ofthe type stated 'in whichthe'shielding housing is formed as lacylindrical shell in which ythe tube socket is supported,`Y af cover which is rigidlysecured to a short wave guide section which-'is detachably coupled Lto the"V rigidly positionedwave guide system, andagland nut `for securingethe housing :cover to the 'cylin 1 These' and' oftheifi objects;` and a'dvantages-l of the inventionawiu i be appare-nr tn fol-rotti ing specicatien" when 'a-kent with" thl acc'cml panying drawings inwiich u Fig. 34 `is ay perspective viefw' off the interior f of# the cover; and

Fig. Llwis'arl end elevation offafinlicrovvave oscillater tube Iii the drawingstheereerence `n'urrieral l idn tif-ies a" Cylindrical metal l shell; vv-liiclri` forms the* major porticiir of the housing" and shield-forte; microwave oscill tr tube 't theshell* having f external threads ati its open upperf endfrupi whicha glariln'ut-E 12? maybe tl'i'ifrerl"Tto'` secure" weaver` s juror- 1 trie Sheri. frire-lower 'endo'f't'h cover telescopes within thel sljf n frange which-'seme againstftne elle" of the shii y may be empereur constructie te Suhthet guide Setto'nfl can' be Hite .eltiellv wh'eilthe gland nuts endg are hded @it The endlfnee vflof .the .tube Tv has e .Cirumferenti-a-l noth .n .in predetermined `sition' with referenceto the 'tubfe output .elemll 'c which is of tectencule'rcressesetioeensi roeitionedbeneath a glass `Winglevv tu. is shown Fl- 4, the mit-1 als .radial 'a1-inenten? with the maier exis y0f the @tutti ,element .e- The hoesinecpvf end-weve e., @le Santoni' may betonnen* l 1in ,any desired meeneemt prefer-abiti, .asqshewny by a hush Ai .i5 securedstO-th-e coverwbva pressed t i which :has affhorefinto .whicnthewaveguides!! iis inserted-= and soldered. The inner end" 0f i the bushing .t ais .ccunterboredito :provide-1a 'shallow cylindrical -tchamber gef having-2 a flaring entrance 9 #for guiding the flange E12-of. theltubel' intofth chamber;` Alpin `or fkeyil Urexteniis doneiiunwliv" operation with the notch n of the tube flange to insure alinement of the rectangular wave guide to an annular plate I4 in conventional manner Y according Vto the particular design of the socket,

Y with the socket contacts I3. The socket is secured Y by a coiled spring I'I which is seated upon another Y set of screws I8 which are threaded through the shell I. The socket plate has one or more peripheral notches I9 into which longitudinal keys 28 of the shell I project to permit limited angular movement of the socket plate YI4 Within the shell. The'outer end 2l Vof the shell I is of somewhat enlarged Vdiameter to provide a thicker, and thereby a mechanically stronger, wall in which a plurality of terminals 22 are mounted.V The particular construction of the terminals and their supporting elements forms no part of the present invention.V The illustrated terminal con- Y struction is of the type whichV is shown in greater angularly, if such adjustment is necessary, to bring the terminal ange 5 of the wave guide section 4 into alinement with the Wave guide system S. The output element e of tube T remains in alinement with the Wave guide passage of section 4 as it is keyed to the cover 3, the tube T and its socket I2 turning with the cover 3' during the slightv angular Vadjustment of the latter which may be necessary to couple the wave guide section 4 to the microwave system. The upper end of the tube T is rmly seated on the end wall of the chamber 8 of the cover 3 by the spring I'I which bears against the socket mounting plate I4.

It is to be understood that the invention is not limited to the particular embodiment herein shown and described as various changes which may be made in the several parts, and in their relative sizes, shapes and relationships, fall Within the spirit Vand scope of the invention as set forth in the following claims.

I claim:

1. A mounting for a microwave oscillator tube of the type having a flanged top beneath which there is a wave guide output element of rectangular cross-section, and said Ytop being provided with alinement means; said mounting comprising a shell with an open end, a cover and means for detachably securing the same upon the open end of said shell, a wave guide tube of'rectangular cross-section rigidly secured to said cover, said cover having a passage therethrough of rectandetail in my copending applicationrSer. No.V

676,682, led June 14, 1946. Y

The'leads 23 which connect the inner ends of Vthe Yterminals 22 to .the several socket contacts nI3v'ar`e`V preferably formed as multipleV turn coilsY of small diameter to insure greatrflexibilityand substantial elimination of Vstress when the socket YI2 moves angularly and axially of the shell I.-

TheY outer end'of the shell I is Ycloseol by'a threadedfcap plate 24 having two projecting lugs Y 25 against which any straight edged device, suchV asa ruler orthe shank of a screwdrivenmay be placed to turn the cap plate into and outrof the shell I., v Y The housing shell I has a'short threaded section-26 between the outerV end section 2| and the Y remainder'of the shell, the threaded section being of somewhat less diameter than the end secv Vtion 2| to leave a small radial shoulder 2'! at the inner end of the largerV diameter section 2 I. The

,housing shell I extends through a chassis 28and is rigidly secured in place by a nut 29 which is turned down upon the threaded sectionY 26 to draw the radial shoulder 21 into 'rm engagement with the lower face of the chassis. The nut,Y 29 may have longitudinally grooves 3Q at its inner surface to clear the ends of the screws I 5, -I Gand I 8 of the floating socket assembly.

' The microwave tube may be readily'removed and replaced by another tuberin the following manner.'VV The nut 2 is backed off to release the Vcover 3from the shell I, and the nut 5 is turned I back ,to release the short wave guide section 4 e fromrthe rigidly supported Vwave guide system S; l Y

'Y Thercover 3 andiwave guide section 4 may then f be lifted vertically to afford access to the interior Y VVi the'housing shell I. The tube T may then be removed from the socket I2, and a new tube in- Y serted.Y The cover-23 and attached wave guide section 4 Y are then replaced, the cover being V gular cross-section forming an extension of the passage of said tube, the inner face of said cover being recessed'to receive the flanged top of an oscillator tube, means at the inner face of said cover to engage the alinement means of a tube top to aline'the oscillator tube `output element with'the passage of said cover, a tube socket Within said shell, and means supporting said tube socket for limited angular movement.

2. A mounting asV recited in claim l, wherein said cover is telescoped with saidrshell and has a flange seated upon the end thereof, and said securing means is a gland nut'threaded upon said shellfand engaging the outer'side ofthe cover ange. f Y

-3. A mounting as recited in claim 1, wherein said means supporting said socket includes a circumferentially notched plate carrying saidsocket, and means on saidshell and extending into a notch of said plate to limit angularY movement of the plate and socket.

` 4. A mounting for a microwave oscillator tube of the type having a wave guide output element of rectangular cross-section, said mounting comprising a housing shell With an open end, a tube socket and means supporting the same in said Yshell for Vlimited angular movement, said socket being spaced ,from the open end of the shell to outside of the shell, a cover for the open end of the housing shell, a wave guide tube of rectangular cross-section rigidly secured to said cover, means on said cover for engagementY with cooperating means onk an oscillator tubetoV aline Ythe output element of aV tube` with the passage turned angularly into su'ch position that the key The nut 2 is of said wave guide tubing, and means detachablysecuring said cover to said shell.

51 A mounting for a microwave oscillator tube Y of the type having a wave guide output element Y cfrectangular cross-section and an end flange with alinement means in predetermined angular "relation to the axes of the output element, said mounting comprising a housing including a shell section and a cover section, a tube socket and means supporting the same within said shell section for limited angular movement, a wave guide tube of rectangular cross-section rigidly secured to said cover, alinement means at the inner face of said cover section for cooperation with the alinement means of an oscillator tube to locate the output element thereof in alinement with the passage of said wave guide tube, means at the outer end of said wave guide tubing for detachably connecting the same to a wave guide system, and means for securing said cover section to said shell section.

6. A mounting for a microwave oscillator tube of the type having a wave guide output element of rectangular cross-section and alinement means; said mounting comprising a cylindrical shell having an open upper end, a cover having a wave guide passage of rectangular cross-section therethrough, said cover having means for cooperation with the alinement means of an oscillator tube to aline the output element thereof with the wave guide passage of the cover, means for detachably securing said cover across the open end of said shell, a tube socket Within said shell and having contacts extending from its lower face, means supporting said socket for limited angular and axial movement with respect to said shell, a set of terminals extending through and insulated from said shell, the inner ends of said terminals being axially spaced from said socket contacts, leads connecting said socket contacts to said terminals, said shell having an upwardly facing circumferential flange above said terminals and an externally threaded section above said flange, and a nut for threading upon said threaded section of the shell to secure the shell to a chassis having an opening therethrough which passes said threaded section but not said circumferential flange.

'7. A mounting as recited in claim 6, wherein said means supporting said socket for limited axial movement includes cooperating sets of axially spaced stops carried by said shell, and spring means urging said socket towards the upper set of stops.

8. A mounting as recited in claim 6, wherein said means supporting said socket includes a circumferentially notched plate carrying said socket, and longitudinal ribs on said shell and extending into the notches of said plate.

9. A mounting for a microwave oscillator tube of the type having a Wave guide output element of rectangular cross-section; said mounting comprising a cylindrical shell having a socket therein for receiving an oscillator tube, a cover for the shell and having a wave guide passage of rectangular cross-section extending axially therethrough, a wave guide tube secured to said cover in alinement with said passage and curved to extend laterally, means for detachably securing said cover across an end of said cylindrical shell, and coupling means on the end of said wave guide tube for detachably connecting the same to a Wave guide system, said coupling means when released being separable from the wave guide system by movement of the cover and wave guide tube axially of said cylindrical shell.

l0. A mounting as recited in claim 9, and for use with oscillator tubes of the type which terminate in a circumferentially notched flange extending around a window beneath which the output element is located, wherein the inner face of the cover is recessed to receive an oscillator tube flange and has a key for mating with the notch thereof.

11. A mounting as recited in claim 9, wherein terminals extend through said shell adjacent the ends thereof opposite said cover, leads extend from the inner ends of said terminals to said socket, and a cap is threaded to said shell to close said opposite end thereof.

12. A mounting as recited in claim 9, wherein said cylindrical shell has a circumferential flange facing towards said cover and is externally threaded adjacent said flange and at the side thereof toward said cover, and a nut is threaded upon said threaded section for cooperation with said flange to secure the shell to and extending through a chassis.

13. In a tube mounting, a removable closure for one end of said shell and having a wave guide passage extending axially therethrough, said end closure having a conical seat at the end of said wave guide passage for engagement by a cylindrical outer terminal at the tip of an oscillator tube, a cylindrical shell, a tube socket within said shell and carried by a disk, axially spaced sets of stop means projecting into said shell at opposite sides of said disk, and spring means within said shell at the inner side of said socket yieldingly urging said disk and socket towards the outer set of stop means.

14. In a tube mounting, a closure for one end of said shell and having a wave guide passage extending therethrough, said end closure having a conical seat for engagement by a cylindrical outer terminal of an oscillator tube, a cylindrical shell, a tube socket within said shell and carried by a circumferentially notched disk, axially spaced sets of stop means projecting into said shell at opposite sides of said disk, spring means within said shell at the inner side of said socket yieldingly urging said disk and socket towards the outer set of stop means, and ribs on said shell and extending into said notches of the disk.

FREDERICK I-I, DRAKE.

REFERENCES CITED The following references are of record in the ille of this patent:

UNITED STATES PATENTS Number Name Date 1,685,766 Mosher Sept. 25, ,1928 2,042,950 Makenny June 2, 1936 2,409,913 Tonks Oct. 22, 1946 2,419,536 Chevigny Apr, 29, 1947 

